[attr="class","header2"]APPEARANCE

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Hikaru was born to a pair of well-off and hard-working individuals, named Eijiro Sato and Hifumi Sato (maiden name: Akiyama). Eijiro was an engineer at his company, originally making car engines, though the company chose to expand into hero gadgetry and assigned Eijiro as the team leader of the new department due to his insight and creativity. Hifumi is a secretary for a well-known CEO of a Tokyo-based fashion company. To say it simply, both of Hikaru's parents are highly successful people, and for the entirety of his life he was expected to be the best at everything he set his mind to. And he wasn't alone in this trial of high expectations, as only a year after he was born, his parents would bring another soul into the world, a younger brother named Isshiki. And while both of them were expected to success in everything they did, Hikaru was a natural intellect, proving to be skilled at anything mental in nature, leading many throughout his life to tout him as a genius, even if it cost him some of his social skills. His brother, however, had no natural talent at birth and struggled to develop any skills through perseverance.

This led to a large amount of favoritism growing up, and despite the many attempts by Hikaru to get his parents to acknowledge the attempts Isshiki put into everything he did and treat him as fairly as they did him, his parents ignored his pleas, and his brother treated his attempts as pity. Between the neglect from his parents, and the perceived pity from his brother, Isshiki was eventually driven to take his own life, doing so the night that Hikaru and his parents had left for Hikaru's graduation celebration, of which the younger sibling hadn't been invited. As they'd parked the car and begun their way back to the apartment, the whole family would be forced to watch as Isshiki leapt from the apartment balcony fifteen stories up and came crashing into the sidewalk below.

The event had proven polarizing for part of the family. While Eijiro made his best attempt to move along as nothing had happened, Hifumi was riddled with grief and mourning from the death of her son, and the suicide note that pinned a majority of the blame upon the two of them and their treatment of him. Eventually, her secluding herself from the outside world and leaving her job would lead Eijiro into filing a divorce, stating he was unable to deal with her incessant inability to cope. Meanwhile, Hikaru would distance himself from both of his parents due to their involvement in his brother's death, and his own perceived involvement would leave him with a 'savior's complex' and worsen his anxiety towards conversating with others and making friends. With graduation passed, his next choice would be to move on to U.A. University with his brother's memory in mind, applying for the school's Management Department to attempt to put his expansive knowledge and skills with mathematics and finances to good use, hoping to offer those services to a hero agency, and just maybe by helping them help others it would somehow lessen the grief of how he couldn't help his brother.